CN102778250B - A kind of gauge pointer index error measuring method and device - Google Patents
A kind of gauge pointer index error measuring method and device Download PDFInfo
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Abstract
The present invention relates to a kind of Computer Image Processing and recognition technology used detect the method for automobile meter pointer index error and use the device of the method.The instrument real image of the present invention by adopting high definition camera device to gather the actual indicating positions of automobile meter pointer, again by the actual deflection angle of Computer Image Processing Software Create gauge pointer, and then calculate corresponding values for actual speed and actual error value according to this actual deflection angle-data.The detection method of the application of the invention and pick-up unit, avoid personal error and the collimation error that human eye detection brings; By using computer image processing technology, greatly strengthen the reliability of recognition result; By adopting computing machine automatically to process, both can reduce the cost of your valency instrument of buying, and due to the generally utilization of computing machine, greatly can improve the efficiency of detection.
Description
Technical field
The present invention relates to automobile instrument detection technique field, particularly relate to a kind of Computer Image Processing and recognition technology used and detect the method for automobile meter pointer index error and use the device of the method.
Background technology
Automobile instrument is extremely important for the driving safety of driver, just can judge to cause misleading to the driving of driver, therefore can cause the dangerous driving of driver, even can affect the personal safety of driver and crew once instrument is damaged or pointer instruction is inaccurate.According to " automobile speed table " (GB10582-2008) regulation, the instruction speed of a motor vehicle of automobile instrument lower than actual vehicle speed, can not should meet following relationship between its instruction speed of a motor vehicle and actual vehicle speed: 0≤indicate the speed of a motor vehicle-actual vehicle speed≤0.1* actual vehicle speed+4km/h.Therefore, automobile instrument is before dispatching from the factory, velocity amplitude need be indicated to detect to it, the method of artificial observation, guestimate is mainly relied in instrument context of detection, usual this method subjectivity is strong, and can not accuracy of detection be ensured, easily cause personal error and the shortcoming such as the collimation error, inefficiency; At present, some complete error measuring system on market, its instrument configured is various, and it is expensive, when tester checks multiple stage instrument, this supporting error measuring system can only simultaneously control survey meters under test, thus causes utilization rate to reduce, and detection efficiency is low, is unfavorable for production development.
Summary of the invention
A kind of Computer Image Processing and recognition technology used is the object of the present invention is to provide to detect the method for automobile meter pointer index error and use the device of the method.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of gauge pointer index error measuring method, gauge pointer is under the state of correct zeroing, receive the multiple main standard velocity amplitude signals by computer input, and perform following steps: under the state that gauge pointer is adjusted to mechanical zero, multiple main standard velocity amplitude signal is inputted to instrument by computing machine, and perform following steps: step S10, respectively acquisition instrument is under zeroing state, and the instrument real image of the indicating positions of pointer when receiving multiple main standard velocity amplitude signal, step S20, is treated to gray level image by described instrument real image, step S30, detects the initial straight of instrument in described gray level image and the deflection straight line of current pointer, step S40, calculates the deflection angle data of the deflection straight line in every width gray level image relative to initial straight, step S50, calculates the values for actual speed of instrument instruction in every width gray level image according to described deflection angle data, step S60, by contrasting described values for actual speed and described standard speed value, calculates actual error value, and judge whether actual error value is in gauge pointer index error value allowed band, if so, then the information by test is exported, on the contrary then output alarm information, step S70, generates test report.
In a preferred embodiment, adopt in described step S10 and can carry out that communication is connected with computing machine and for the high definition camera device of Real-time Collection gauge pointer indicating image, described high definition camera device be configured with the object space telecentric lens adopting parallel light path design; Described step S10 is specially: utilize the instrument real image of object space telecentric lens acquisition instrument pointer under zeroing state; Then instrument real image during pointed multiple main standard velocity amplitude scale is gathered respectively; Ensure that the relative position of object space telecentric lens and detected gauge pointer initial point is constant, and make the image pickup scope of object space telecentric lens cover described detected instrument completely.
In a preferred embodiment, in described computing machine, installation can be used for AutoCAD tool software image being carried out to identification and analysis process.
In a preferred embodiment, described step S30 is specially: imported by gray level image in described AutoCAD tool software; The coordinate points that when the corresponding coordinate points of gauge pointer point of origin P 0 and pointer point to multiple main standard velocity amplitude scale respectively, pointer terminal P1 is corresponding is indicated in AutoCAD tool software, described gauge pointer point of origin P 0 indicates once, all adopts thereafter identical pointer initial point as the initial point of deflection pointer; Indicate the initial straight at pointer indicating position place during zero adjusting state, this initial straight only need generate once, all adopts thereafter identical initial straight to determine the deflection area of pointer; Continue the deflection straight line indicating pointer pointer indicating position place when instrument receives main standard velocity amplitude signal respectively.
A kind of gauge pointer index error measurement mechanism of instrumentation pointer index error measuring method, it comprises instrument positioning component, for the high definition camera device of acquisition instrument pointer indicating image and the computing machine for carrying out identification and analysis process to pointer indicating image that is electrically connected with instrument positioning component, described instrument positioning component comprises: for firmly place described meters under test and base roughly in rectangular parallelepiped; Standing on above described base also can make the camera lens of high definition camera device towards the high definition camera device support of base; Be arranged at the periphery place at described high definition camera device top and light source direction can be made towards the triangular laser bundle device of base; And be arranged at described base upper surface and light source direction can be made to be parallel to the horizontal reference laser beam device of base upper surface.
In a preferred embodiment, described high definition camera device is configured with the object space telecentric lens adopting parallel light path design.
In a preferred embodiment, described high definition camera device support comprise one roughly in right cylinder and stand on abutment sleeve above described base, one end is set in described abutment sleeve and regulating sleeve roughly in " ┐ " shape, one end is set in the described regulating sleeve other end expansion link, described high definition camera device is arranged at the other end of described expansion link.
In a preferred embodiment, the upper surface of described base is formed and is parallel to the long limit of described base upper surface and the cross slide way groove of broadside and longitudinal rail groove respectively and described cross slide way groove and longitudinal rail groove intersect at the center of described base upper surface, and the abutment sleeve of described high definition camera device support is arranged at one end of described longitudinal rail groove.
In a preferred embodiment, the horizontal geometrical clamp that can slide respectively to center is provided with in described cross slide way groove, be provided with longitudinal geometrical clamp that can slide respectively to center in described longitudinal rail groove, between described horizontal fixed block and described longitudinal fixed block, form the positioning area firmly can placed for instrument to be checked.
In a preferred embodiment, the abutment sleeve of described high definition camera device support and regulating sleeve are respectively arranged with the securing member of adjustable support height, high definition camera device transversal stretching length, described horizontal reference laser beam device are provided with the securing member of adjustable laser beam height and irradiating angle; Described securing member can adopt following in one: nut and nut with the use of, nut and bolt with the use of.
Beneficial effect of the present invention is: the instrument real image of the present invention by adopting object space telecentric lens to gather automobile instrument actual indicating positions of pointer when being adjusted to the state of mechanical zero and receiving standard speed value signal, again by the actual deflection angle of Computer Image Processing software analysis marking instrument list index, and then calculate values for actual speed and actual error value according to deflection angle data, and contrast judges whether this actual error value is in gauge pointer index error value allowed band.The application of the invention, avoids personal error and the collimation error that human eye detection brings; By using computer image processing technology, greatly strengthen the reliability of recognition result; By adopting Computer Image Processing software analysis to measure, both can reduce the cost of your valency instrument of buying, and due to the generally utilization of computing machine, greatly can improve the efficiency of detection.
Accompanying drawing explanation
The process flow diagram about gauge pointer index error measuring method of Fig. 1 for providing in an invention.
The gauge pointer deflection angle generation schematic diagram of Fig. 2 for providing in an invention.
The stereoscopic frame composition about gauge pointer index error measurement mechanism of Fig. 3 for providing in an invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the present invention is described in further detail.
A kind of gauge pointer index error measuring method, it passes through to check pointer position during multiple main standard velocity amplitude to judge the index error of pointer.Before test, the object space telecentric lens of high definition camera device and detected instrument are oppositely arranged, and ensure that in the process detected in instrument, the relative position of object space telecentric lens and detected gauge pointer initial point is constant, and makes the image pickup scope of object space telecentric lens cover detected instrument completely.
Refer to Fig. 1, first, gauge pointer needs to do correct zeroing to make pointer instruction at the zero graduation block of instrument, and using this position as the initial position of subsequent survey, then by multiple main standard velocity amplitude signals that computing machine inputs instrument, and following steps are performed:
Step S10, by object space telecentric lens respectively acquisition instrument under zeroing state and the instrument real image of the indicating positions of pointer when receiving multiple main standard velocity amplitude signal;
Step S20, the instrument real image in computing machine receiving step S10 be gray level image by its pre-service;
Step S30, instrument gray level image in step S20 is imported in Computer Image Processing software, and indicate straight line L0 and pointer point of origin P 0 by image processing software analysis to measure, owing to needing to ensure that the relative position of object space telecentric lens and detected gauge pointer initial point is constant in the process of test, so this initial straight L0 and pointer point of origin P 0 need generate once, thereafter all adopt identical initial straight to determine the deflection area of pointer, pointer point of origin P 0 continues the deflection straight line L1 indicating pointer indicating positions place when instrument receives main standard velocity amplitude signal respectively,
Step S40, calculates and generates the actual deflection angle-data θ of deflection straight line L1 relative to initial straight L0 in AutoCAD tool software;
Step S50, in the present embodiment, by the deflection angle data θ input computer Excel form in step S40, can be calculated values for actual speed corresponding for these deflection angle data by the automatic computing formula of macro definition;
Step S60, by the values for actual speed in contrast step S60 and described standard speed value, calculate actual error value, and judge whether actual error value is in gauge pointer index error value allowed band, if, then export the information by test, otherwise then output alarm information need be debugged to instrument again to point out tester;
Step S70, after having tested, generates test report.
In order to the instrument real image of pointer indicating position during multiple main standard velocity amplitude signal is integrated in an interface, in step S20, install in computer system and can be used for AutoCAD tool software image being carried out to identification and analysis process, instrument real image in computing machine receiving step S10, then import in described AutoCAD tool software, several instrument gray level images are generated by pre-service, and by these several with the pointer initial point of instrument for benchmark carries out superposition, thus the indicating positions of pointer is presented in same instrument under making multiple friction speed value signal.
Preferably, have employed in this method and can carry out that communication is connected and for the high definition camera device of Real-time Collection gauge pointer indicating image with computing machine, this high definition camera device is configured with the object space telecentric lens that adopts parallel light path design, the light being only parallel to optical axis just can better the minor detail place of incident detected instrument, thus make image there will not be shade, and due to its can make the brightness of image that collects more evenly, the edge of image is more clear, thus better eliminates the collimation error.
By above measuring method, the database of deflection angle angle value θ when can set up the main speed scale of pointed in a computer, the automatic computing formula of the macro definition in Excel is utilized to obtain the actual speed scale of meters under test pointed respectively, and draw error amount, then contrast with error amount allowed band, in a preferred embodiment, the allowed band of error amount is following formula: the 0≤instruction speed of a motor vehicle-actual vehicle speed≤0.1* actual vehicle speed+4km/h, therefore, when error amount is within the scope of this, then think that pointer debugging is correct; If exceed this scope, then point out error signal, again need debug gauge pointer with the reviewer accused.
When carrying out error measure to meters under test, measurement mechanism need be set in advance, a kind of gauge pointer index error measurement mechanism, it comprises for carrying out steadily fixing instrument positioning component to instrument 80, for the high definition camera device 10 of acquisition instrument pointer indicating image and realizes with instrument positioning component the computing machine 20 for carrying out identification and analysis process to pointer indicating image that is electrically connected, in other embodiments, the load device (scheming not look) be connected with instrument 80 can also be increased.
Refer to Fig. 3, preferably, instrument positioning component comprises: for firmly place described meters under test and base 30 roughly in rectangular parallelepiped, to stand on above base 30 and can make the camera lens of high definition camera device 10 towards base 30 high definition camera device support 40, be arranged at described high definition camera device 10 top periphery place and light source direction can be made towards the triangular laser bundle device 50 of base 30 and be arranged at base 30 upper surface and light source direction can be made to be parallel to the horizontal reference laser beam device 60 of base 30 upper surface.Wherein, instrument 80 is steadily placed on the upper surface place of base plate 30, the camera coverage of high definition camera device 10 covers instrument 80 completely, and the optical range of penetrating of triangular laser bundle device 50 covers high definition camera device 10 and instrument 80 completely, horizontal reference laser beam device 60 penetrate optical range towards instrument 80.
Preferably, high definition camera device 10 is configured with the object space telecentric lens that adopts parallel light path design, the light being only parallel to optical axis just can better the minor detail place of incident detected instrument, thus make image there will not be shade, and due to object space telecentric lens can make the brightness of image that collects more evenly, the edge of image is more clear, thus better eliminates the collimation error.
High definition camera device support 40 comprise one roughly in right cylinder and stand on abutment sleeve 41 above base 30, one end is set in abutment sleeve and regulating sleeve 42 roughly in " ┐ " shape, one end is set in regulating sleeve 42 other end expansion link 43, the other end of expansion link 43 connects high definition camera device 10 and triangular laser bundle device 50.
The cross slide way groove 31 being formed with the long limit that is parallel to described base upper surface respectively and broadside at the upper surface of base 30 with longitudinal rail groove 32 and described cross slide way groove 31 and longitudinal rail groove 32 square crossing in the center of base 30 upper surface, wherein, the abutment sleeve of high definition camera device support 42 stands on one end of longitudinal rail groove 32.
Further, two horizontal geometrical clamps 33 that can slide respectively to center are provided with in cross slide way groove 31, be provided with two longitudinal geometrical clamps 34 that can slide respectively to center in longitudinal rail groove 32, is formed between horizontal fixed block 33 and longitudinal fixed block 34 can for instrument 80 to be checked firm place and the positioning area 70 of scope can be changed.
The abutment sleeve 41 of high definition camera device support 40 and regulating sleeve 42 are respectively arranged with the securing member 90 of adjustable support height and high definition camera device transversal stretching length, horizontal reference laser beam device 60 is provided with the securing member 90 of adjustable laser beam height and irradiating angle, this securing member 90 can adopt following in one: nut and nut with the use of, nut and bolt with the use of.
When actual measurement, first instrument 80 is placed in positioning area 70, again by regulating horizontal fixed block 33 and longitudinal fixed block 34, to make instrument 80 by the center be steadily fixed on above base 30, then by regulating high definition camera device support 40, make the object space telecentric lens of high definition camera device 10 just to the center of instrument 80, and make the camera coverage of object space telecentric lens cover instrument 80 completely, instrument 80 in uniform light is made again by adjusting triangle laser beam device 50 and horizontal reference laser beam device 60, then rate signal is inputted to instrument 80 by computing machine 20 or meter loads, high definition camera device 10 starts to gather the instrument real image of pointer indicating position and is uploaded in computing machine 20, then computing machine 20 pairs of images identify and process, and the actual deflection angle of instrument for generating list index, and then calculate corresponding values for actual speed and actual error value according to this actual deflection angle-data, finally contrast error allowed band again to carry out judging and generating test report.
To sum up, the detection method of the application of the invention and pick-up unit, avoid personal error and the collimation error that human eye detection brings; By using computer image processing technology, greatly strengthen the reliability of recognition result; By adopting Computer Image Processing software analysis to measure, both can reduce the cost of your valency instrument of buying, and due to the generally utilization of computing machine, greatly can improve the efficiency of detection.
Although the description of this invention carries out in conjunction with above specific embodiment, those skilled in the art can carry out many replacements, modifications and variations, be apparent according to above-mentioned content.Therefore, all like this substitute, improve and change be all included in the spirit and scope of attached claim.
Claims (8)
1. a gauge pointer index error measuring method, it is characterized in that, under the state that gauge pointer is adjusted to mechanical zero, multiple main standard velocity amplitude signal is inputted to instrument by computing machine, install in described computing machine and can be used for AutoCAD tool software image being carried out to identification and analysis process, and perform following steps:
Step S10, respectively acquisition instrument under zeroing state and the instrument real image of the indicating positions of pointer when receiving multiple main standard velocity amplitude signal;
Step S20, is treated to gray level image by described instrument real image;
Step S30, detects the initial straight of instrument in described gray level image and the deflection straight line of current pointer;
Step S40, calculates the deflection angle data of the deflection straight line in every width gray level image relative to initial straight;
Step S50, calculates the values for actual speed of instrument instruction in every width gray level image according to described deflection angle data;
Step S60, by contrasting described values for actual speed and described standard speed value, calculates actual error value, and judge whether actual error value is in gauge pointer index error value allowed band, if so, then the information by test is exported, on the contrary then output alarm information;
Step S70, generates test report;
Described step S30 is specially: imported by gray level image in described AutoCAD tool software; The coordinate points that when the corresponding coordinate points of gauge pointer point of origin P 0 and pointer point to multiple main standard velocity amplitude scale respectively, pointer terminal P1 is corresponding is indicated in AutoCAD tool software, described gauge pointer point of origin P 0 indicates once, all adopts thereafter identical pointer initial point as the initial point of deflection pointer; Indicate the initial straight at pointer indicating position place during zero adjusting state, this initial straight only need generate once, all adopts thereafter identical initial straight to determine the deflection area of pointer; Continue the deflection straight line indicating pointer pointer indicating position place when instrument receives main standard velocity amplitude signal respectively.
2. gauge pointer index error measuring method according to claim 1, it is characterized in that, adopt in described step S10 and can carry out that communication is connected with computing machine and for the high definition camera device of Real-time Collection gauge pointer indicating image, described high definition camera device be configured with the object space telecentric lens adopting parallel light path design; Described step S10 is specially: utilize the instrument real image of object space telecentric lens acquisition instrument pointer under zeroing state; Then instrument real image during pointed multiple main standard velocity amplitude scale is gathered respectively; Ensure that the relative position of object space telecentric lens and detected gauge pointer initial point is constant, and make the image pickup scope of object space telecentric lens cover described detected instrument completely.
3. one kind uses the gauge pointer index error measurement mechanism of gauge pointer index error measuring method as claimed in claim 1, it is characterized in that, it comprises instrument positioning component, for the high definition camera device of acquisition instrument pointer indicating image and the computing machine for carrying out identification and analysis process to pointer indicating image that is electrically connected with instrument positioning component, described instrument positioning component comprises:
For firmly place meters under test and roughly in the base of rectangular parallelepiped;
Standing on above described base also can make the camera lens of high definition camera device towards the high definition camera device support of base;
Be arranged at the periphery place at described high definition camera device top and light source direction can be made towards the triangular laser bundle device of base; And
Be arranged at described base upper surface and light source direction can be made to be parallel to the horizontal reference laser beam device of base upper surface.
4. gauge pointer index error measurement mechanism according to claim 3, is characterized in that, described high definition camera device is configured with the object space telecentric lens adopting parallel light path design.
5. gauge pointer index error measurement mechanism according to claim 3, it is characterized in that, described high definition camera device support comprise one roughly in right cylinder and stand on abutment sleeve above described base, one end is set in described abutment sleeve and regulating sleeve roughly in " ┐ " shape, one end is set in the described regulating sleeve other end expansion link, described high definition camera device is arranged at the other end of described expansion link.
6. gauge pointer index error measurement mechanism according to claim 3, it is characterized in that, the upper surface of described base is formed and is parallel to the long limit of described base upper surface and the cross slide way groove of broadside and longitudinal rail groove respectively and described cross slide way groove and longitudinal rail groove intersect at the center of described base upper surface, and the abutment sleeve of described high definition camera device support is arranged at one end of described longitudinal rail groove.
7. gauge pointer index error measurement mechanism according to claim 6, it is characterized in that, the horizontal geometrical clamp that can slide respectively to center is provided with in described cross slide way groove, be provided with longitudinal geometrical clamp that can slide respectively to center in described longitudinal rail groove, between described horizontal fixed block and described longitudinal fixed block, form the positioning area firmly can placed for instrument to be checked.
8. gauge pointer index error measurement mechanism according to claim 6, it is characterized in that, the abutment sleeve of described high definition camera device support and regulating sleeve are respectively arranged with the securing member of adjustable support height, high definition camera device transversal stretching length, described horizontal reference laser beam device are provided with the securing member of adjustable laser beam height and irradiating angle; Described securing member can adopt following in one: nut and nut with the use of, nut and bolt with the use of.
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| CN103196480B (en) * | 2013-03-27 | 2016-04-20 | 王文博 | Automobile instrument automatic detection device and detection method |
| CN103743425B (en) * | 2013-12-27 | 2016-04-13 | 青岛东田智能科技有限公司 | The detection method of gauge pointer dynamic response capability |
| CN104019844B (en) * | 2014-06-16 | 2016-05-25 | 哈尔滨工业大学 | A kind of gauge pointer blur detecting method based on Fast Fourier Transform (FFT) |
| CN105652039A (en) * | 2014-11-14 | 2016-06-08 | 上海伟世通汽车电子系统有限公司 | Method and system for detecting motion stability of speed meter pointer |
| CN106643853A (en) * | 2015-11-02 | 2017-05-10 | 丹阳市米可汽车零部件厂 | Automobile instrument detection method |
| CN106017705B (en) * | 2016-05-11 | 2018-11-27 | 红旗仪表（长兴）有限公司 | A kind of designation equipment of dial thermometer dial plate and the generation method of dial plate |
| CN107632279B (en) * | 2017-09-22 | 2024-06-11 | 四川德阳德仪电子仪器有限公司 | Electric measuring instrument calibrating device and calibrating method |
| CN109211268A (en) * | 2018-08-15 | 2019-01-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of gauge pointer calibration method, device and computer readable storage medium |
| CN109029537A (en) * | 2018-08-17 | 2018-12-18 | 国营芜湖机械厂 | A kind of pointer-type sync bit indicator test device and its application method |
| CN110850133A (en) * | 2019-11-29 | 2020-02-28 | 北京工业大学 | Mechanical indicating ammeter pointer balancing device |
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| KR100911566B1 (en) * | 2008-04-29 | 2009-08-10 | 현대자동차주식회사 | Digital instrument panel for providing united information for vehicle |
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